It was with considerable interest last month that I set out to track down where in the world there are still factories making tubes. My research found them in Slovakia, Russia, and China, and it’s ...

CLEVELAND — Images from the moon will be sent to Earth with higher power and increased efficiency due to communications hardware provided by NASA’s Glenn Research Center. The hardware, called the ...

The project is known as NP-100v12 which refers to a simple headphone amplifier built around the 12AU7 vacuum tube. The 12AU7 is also known as ECC82 in Europe that is popular in the audio world since ...

The amplifier project utilizes vacuum tubes on the preamplifier section to produce a push pull output stage while using point-to-point connections. Each of the tubes are consuming 940 mA of current ...

I don't know how good they are, but you could check out the bottlehead kits. I have not heard them nor tried to build them, so I'm not much help there, but I though you might want to take a look.

With an onboard Valve React Circuit, this 200-watt power amp is designed to push air through a real guitar speaker, giving you quote/unquote real amp feel when using a modeller ...